US companies aren't dependent on the rest of the world. "If you look at US corporate profits, they're less dependent on the rest of the world," said Sharps. "The corporate profit for the US is more domestically driven than pools outside of the US and our economy broadly is less export driven. A slow growth world has played more to that hand."

The US has the right kind of companies for the environment. "The US is very well represented among industries and companies that are gaining share of the economy," said Sharps. "Most of the global platform profit growth is driven by US companies. Facebook in social media, Amazon and Priceline in ecommerce, I think we're the furthest along in cloud computing. There are a couple of really good biopharma companies based in Europe and Asia, but the preponderance of innovation has come out of the US."

Sharps expects the good returns to continue, if a little slower than in past years. He remarked that earnings for companies, which have taken a hit recently, should return to positive territory in 2016 and that will lead investors back into the market, pushing prices up.